package com.ruoyi.framework.web.service;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;
import com.ruoyi.common.core.domain.entity.SysUser;
import com.ruoyi.common.core.domain.model.LoginUser;
import com.ruoyi.common.enums.UserStatus;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.MessageUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.system.domain.SysTenant;
import com.ruoyi.system.service.ISysTenantService;
import com.ruoyi.system.service.ISysUserService;

/**
 * 用户验证处理
 *
 * @author ruoyi
 */
@Service
public class UserDetailsServiceImpl implements UserDetailsService
{
    private static final Logger log = LoggerFactory.getLogger(UserDetailsServiceImpl.class);

    @Autowired
    private ISysUserService userService;
    
    @Autowired
    private SysPasswordService passwordService;

    @Autowired
    private SysPermissionService permissionService;
    
    @Autowired
    private ISysTenantService tenantService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException
    {
        // 分割用户名和租户编码
        String[] parts = username.split("@");
        String actualUsername = parts[0];
        String tenantCode = parts.length > 1 ? parts[1] : "default";
        
        // 查询租户信息
        SysTenant tenant = tenantService.selectTenantByCode(tenantCode);
        if (StringUtils.isNull(tenant))
        {
            log.info("登录租户：{} 不存在.", tenantCode);
            throw new ServiceException(MessageUtils.message("tenant.not.exists"));
        }
        else if (UserStatus.DISABLE.getCode().equals(tenant.getStatus()))
        {
            log.info("登录租户：{} 已被停用.", tenantCode);
            throw new ServiceException(MessageUtils.message("tenant.blocked"));
        }
        
        SysUser user = userService.selectUserByUserName(actualUsername);
        if (StringUtils.isNull(user))
        {
            log.info("登录用户：{} 不存在.", username);
            throw new ServiceException(MessageUtils.message("user.not.exists"));
        }
        else if (UserStatus.DELETED.getCode().equals(user.getDelFlag()))
        {
            log.info("登录用户：{} 已被删除.", username);
            throw new ServiceException(MessageUtils.message("user.password.delete"));
        }
        else if (UserStatus.DISABLE.getCode().equals(user.getStatus()))
        {
            log.info("登录用户：{} 已被停用.", username);
            throw new ServiceException(MessageUtils.message("user.blocked"));
        }
        
        // 验证用户是否属于指定租户
        if (!tenant.getTenantId().equals(user.getTenantId()))
        {
            log.info("登录用户：{} 不属于租户：{}.", username, tenantCode);
            throw new ServiceException(MessageUtils.message("user.tenant.not.match"));
        }

        passwordService.validate(user);

        return createLoginUser(user, tenant.getTenantId());
    }

    public UserDetails createLoginUser(SysUser user)
    {
        return new LoginUser(user.getUserId(), user.getDeptId(), user, permissionService.getMenuPermission(user));
    }
    
    public UserDetails createLoginUser(SysUser user, Long tenantId)
    {
        return new LoginUser(user.getUserId(), user.getDeptId(), tenantId, user, permissionService.getMenuPermission(user));
    }
}
